
Sheldon and Iroquois anchor this mid-1960s survey of eastern Iroquois County, where the Illinois prairie meets the Indiana state line at Effner. The landscape is defined by an extensive drainage network, including the meandering Iroquois River and numerous engineered waterways like Concord Ditch and Bonham Ditch. This era shows a robust rail infrastructure crossing the region, with the New York Central and Toledo Peoria and Western intersecting at the Sheldon town site, while the Chicago Milwaukee St Paul and Pacific runs north toward Beaver Creek.
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